Elevator.



PATENTED APR. 3, 1906.

J. LEHRMAN.

ELEVATOR.

APPLIOATION FILED FEB. 14. 1905 3 SHEETS-SHEET 1.

PATENTED APR. 8

J. LEHRMAN.

/ 3 QHEETS-SHEET 2.

PATENTED APR. 3

J. LBHRMAN. ELEVATOR.

APPLIUATION FILED FEB. 14. 1905.

3 SHEETS-SHEET 3v Witnaowo @tbouwq strafrns ATENT OFFICE.

JOHN LEHRMAN, OF ALLENTOi/VN, PENNSYLVANIA, ASSIGNOR TO JOHN G. SPEIDEL, OF READING, PENNSYLVANIA.

ELEVATOR.

Specification of Letters Patent.

Patented April 3, 1906.

Application filed February 14, 1905. Serial No. 245,593.

To (all whom it Wtay concern:

Be it known that I, J onNLEuRMAN, a citizen of the United States, residing at Allentown, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful Improvements in Elevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled. in the art to which it appertains to make and use the same.

This invention relates to certain new and useful improvements in elevators, and more particularly to that class known as dumbwaiters.

The object of the invention. is to improve the construction of what is commonly known as a floor dumb-waiterf producing a new improved waiter which may be normally retained below a floor, so that the top of the waiter may be positioned in the same horizontal plane with. the floor.

Another object of the invention is to improve the construction of a locking mechanism for retaining the elevator in .a stationary position.

A still further object of the invention is to construct an elevator which is efficient in operation, composed of a minimum number of parts, and simple and durable in its construction.

With these and other objects in view the invention consists in certain novel constructions, combinations, and arrangements of parts, as will be hereinafter fully described, illustrated in the accompanying drawings, and more particularly pointed out in the claims hereto appended.

In the drawings, Figure 1 is a perspective view of a completed device constructed in accordance with the present invention. Fig. 2 is a fragmentary perspective view of a portion of the gearing of the elevator, showing the same in a locked position. Fig. 3 is a fragmentary perspective View of the elevatorframe, showing the gearing of the device in an unlocked position. Fig. A is a fragmentary perspective view of the casing or car of the device. Fig. 5 is a horizontal sectional view of the car or casing. Fig. 6 is a view in side elevation of a portion of the locking mechanism employed for retaining the car and the gearing in a stationary position.

i Fig. 7 is a fragmentary perspective view of a portion of a dumb-waiter structure, showing another embodiment of the locking mechanlsm. Flg. 8 1s a fragmentary view of the frame of the dumb-waiter, showing another pro )er provided with a lifting mechanism 2' ant: a fastening mechanism 8 for retaining the waiter or car 1 in an adjusted position and which is normally retained in an opening 1 in. a floor 5 and closing the same.

The waiter or car 1 comprises a plurality of parallel walls and brackets 6, upon which are mounted shelves 8. The rear or back wall 9 is provided with an opening extending the entire length thereof, said opening being closed by a metallic fabric 10, which is removably mounted upon the rear wall 9 by means of strips 11 11, which are positively retained in position, as by bolts or screws 12. The walls of the car or waiter 1 are preferably formed of metal, which may be galvanized iron. Upon the front of the waiter are a plurality of doors 13 and 1 1. The car or waiter 1 is provided with a top 15, within which may be countersunk upon its under surface a plural ity of parallel metallic bars or plates 16, which materially increase the durability of the top and positively insure the same from warping or destruction. Secured near the front edge and upon the sides of the waiter 1 are members 17 17, constituting guides. A frame is secured to the bottom of the car or waiter, said. frame comprising parallel vertical members 18, which are connected. near their lowerend by a transverse member 19.

Secured, preferably in a central position, upon the bottom of the car 1 is a substantially rectangular frame 20. The frame 20 is provided with a beam 21, projecting beyond the sides of the same. The beam 21 carries plates 22, supporting cushioning means, as springs 23. The frame 20 and the parallel extensions 18 18 are preferably connected by means of horizontal bars or members 24.

A horizontal frame 25 is provided with substantially parallel beams or members 26 26. Each member 26 is provided with grooved rolls 27. The rolls 27 are positioned. within elongated. apertures formed in the members 26. The guide members 17 of the "waiter are positioned within the grooves of rolls 27. A removable bar 28, provided with locking-nuts 29, is carried by the members 26. By adjusting the nuts 29 on bar 28 the members 26 are either separated or drawn together.

Secured upon the frame in diametrically opposite positions are pulleys 30. Flexible members, as cables 31, are passed around the pulleys 30 and are secured at one of their ends to beam 21, at 32, and to the horizontal bar 33 at their opposite ends. Bar 33 is provided with hooks .34 for supporting weights 35. A threaded bolt 37, carried by the bar 33, is provided with an arrow-head 36.

The cushioning means 23 provides suitable bumpers for the car or waiter, and if it is desirable beams or bars 38 may be secured at right angles to said bar 21, Fig. 9, and cushioning means 23 positioned thereon.

I employ a locking device 3 for securing the waiter in a stationary pbsition. The device 3 comprises a bell-crank lever 39, which is pro vided with a hook 40. A recessed or cut-out portion 42 is formed upon extension 43 of the lever 39 for receiving the arrow-head 36 when said arrow-head is positioned between the extension 43 and the pivotally-mounted member 44, coacting with said extension. The member 44 is similarly constructed to exten sion 43, and therefore is provided with a hooked end 48 and with a recessed or cut-out portion 42. The lever 39 is pivotally mounted at 45, and member 44 is mounted at 45 upon the frame 25. Aconnecting-lin k 46 is secured at 47 to lever 39 near the cut-out portion 42 and at its opposite end near the upper end of member 44. A spring 48 is secured at one end to link 46 and member 44, and at its opposite end is preferably secured to a pin 49, secured to the frame 25. The lever 39 is provided with a curved portion 50, terminating in extension 51. Secured at 52 to member 39 is a spring 53, which is secured at its opposite end to a pin 54. It will be obvious that when the arrow-head 36 rides between the two removable members 43 and 44 constituting gripping-jaws, the wa itcr will be secured in a stationary position until said jaws are moved apart by actuating the lever 39. The lever 39 is actuated by inserting a bar or any suitable device into aperture 55 in the floor, Fig. 2, for pressing downward upon the lever, and thereby pivoting the jaws. Upon the releasing of the lever 39 the jaws will be'returned to their normal parallel position, Fig. 2, by means of the springs.

The framework 25 is provided with recessed or cut-out portions 56, in which the guide members 17 17 of the waiter travel.

In Fig. 7 a fastening mechanism is shown, which is preferably operated from the front portion of the frame. By employing a pivoted member it will be possible to operate the same when the waiter is positioned in the corner of a structure, which would not be true of the mechanism depicted in, Fig. 2. This mechanism comprises a hooked bar 57, pivotally mounted at 58 upon the frame 25, and hooked bar, 57*, pivotally mounted at 58 upon the frame 25. The bar 57 a is connected by a link 59 below its pivot-point 58 to its coacting member 57 above its pivotal point 58. A horizontal member 60 is fixedly secured by any suitable means to member 57*, so that movement is imparted thereto by means of a movable bar or member 61, which is pivoted at 62 upon the frame 25. Notched portions 63 are formed upon the engaging ends of bars or members 60 and 61 for retaining the same in an operative position. Brackets 64 and 65, carried by the frame 25, limit movement of the-members 60 and 61. Springs 66 and 67 are secured to bars or members 60 and 61, respectively, for retaining them in their normal position, as depicted in Fig. 7. I/Vhen it is desired to move the members 57 and 57 constituting jaws, a rod 68 is preferably used for the purpose of depressing the outer end of the bar 61, and thereby causing the same to be swung upon its pivot and raise the notched end of bar 60, which causes the jaws to be moved apart, thereby releasing the'arrow-head 36 if the same is positioned within said aws.

In Fig. 8 I have shown a pair of sheaves or pulleys 30 carried by the frame 25 instead ofa single sheave or pulley, as shown in the other embodiments of my invention. By using a pair of sheaves upon opposite sides of the frame member 21 is retained in an approximately central position beneath the comparatively large waiter, this positioning of the member-21 not being attainable when employing a single pulley in the construction when using a waiter having a comparatively large floor-space.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a device of the character described, the combination with a frame, a waiter positioned within said frame, of pulleys carried by said frame, weighted means assembled with said pulleys, flexible means passed around said pulleys and connected at one end to said waiter and at the opposite to said weighted means, an arrow-head secured to said weighted means, a locking mechanism carried by said frame adapted to engage said arrow-head for retaining said waiter in a fixed. position, said locking mechanism comprising a bell-crank lever provided with a re cess and a hooked end, a coacting movable member assembled with said lever, comprising a body portion having a recess and a hooked'end, link means connecting said bellcrank lever and said movable member, and

expansible means secured to said frame and connected to said movable member and bellcrank lever.

I 2. In. a mechanism of the class described, the combination with a waiter, of weighted means for lifting the same, a locking mechanism for retaining said waiter and weighted means in a fixed position, said mechanism comprising a pair of pivotally mounted hooked members, a link connecting said members upon opposite sides of their pivot-point, a lever secured to one of said. members, eX- pansible means connected with the outer end of said lever and secured to a suitable support, an eXpansible member secured to one of said members near the upper end thereof and to a support, and means carried by said weighted means and adapted. to engagesaid locking mechanism.

3. In a mechanism of the class described, the combination with a frame, a waiter mounted therein, weighted. means assembled with said frame and connected to said waiter, of a locking mechanism secured to 'sai d frame, said mechanism comprising a lever pivotally connected to said frame, said lever comprising an arm provided with a curved extension, a right-angled extension provided with a recess and a hooked end formed integral with said arm, a coacting, movable member assembled with said lever, said movable member comprising a body portion having a recess and a hooked end, a link pivotally connected to said lever and coacting member, expansible means connected to said coacting member and lover, and means secured to said weighted means and adapted to engage the locking mechanism. for holding the waiter in an adjusted position.

4. In a device of the character described, the combination of a frame provided with a pair of substantially parallel beams, grooved rolls journaled in each of said beams, means connecting said beams and capable of adjusting the same, a waiter mounted witl'iin said frame, said waiter provided with guiderails secured upon opposite faces thereof, said guide-rails movably mounted Within the grooved portion of said rolls, weighted means coacting with said. frame, and. waiter, and locking means for said waiter.

5. In a mechanism of the class described, the combination with a frame, of a waiter mounted therein, guiding means formed upon the sides of said waiter, parallel extensions provided with. rolls carried by said frame, said, rolls adapted to engage the guiding means, a bar mounted upon the lower end of said parallel extensions, and provided with means for adjusting said extensions, a locking mechanism mounted upon said frame, said mechanism comprising a pair of pivotally-mounted members, each member provided with a hooked end, expansible means normally retaining said pivotally-mounted members in substantially parallel position, weighted means assembled with said frame and. secured to said waiter, and means carried by said weighted means and engaging said locking mechanism for retaining said. waiter in an adjusted position.

6. In. a mechanism of the class described, the combination of a frame provided with adjustable rolls, a waiter mounted within said frame and normally in engagement with said rolls, cushioning means carried by said waiter,

weigliited means secured to said waiter for causing movement thereof, a fastening mechanism for locking said waiter in a fixed position, said mechanism comprising a bell-crank lever provided with a hook formed at one end and an angular extension formed upon its opposite end, expansiblemeans connected to said lever near one end and secured to said frame, a movable member secured to said frame and coacting with said bell-crank lever, said movable member provided with a hooked end, connecting means secured to said lever and member, expansible means connected to said member and frame, and means carried by said weighted means and adapted to be engaged by said fastening mechanism.

'7. In a mechanism of the class described, the combination with a movable waiter, means for lifting said. waiter, of a locking mechanism coacting with said lifting means for retaining said. waiter in an adjusted position, said locking mechanism comprising movable jaws, a lever fixedly secured to one of said jaws, movable means connecting said jaws, and means movable with said waiter and adapted to engage said jaws for locking said. waiter in an adjusted position.

8. In a mechanism of the class described, the combination with a support, a movable supporting member carried by said support, of a locking mechanism carried by said sup port, comprising a pair of pivotally-mounted jaws, a link connecting said jaws, a lever fixedly secured to one of said jaws, and means carried by said supporting member and adapted to be positioned between said jaws for securing said member in an adjusted position.

9. In a mechanism of the class described, the combination with a support, a movable supporting member carried by said support, of a locking mechanism carried by said sup port, said. locking mechanism comprising a pair of pivotally-mounted jaws, a link connected to one of said. jaws near its pivot-point and to the other jaw above its pivot-point,

lever means fixedly secured to one of said jaws, yielding means for retaining said. jaws in their normal position, and means carried by said supporting member and adapted to be positioned. between said aws for retaining said member in an adjusted position.

In testimony whereof I a'l'liX my signature in presence of two witnesses.

JOHN LEI-IRMAN. Witnesses GEORGE E. Borne, '1. II. Morris. 

